Genomic Instability of Human Mammary Epithelial Cells Overexpressing a Truncated Form of EMSY
Bibliographic record
Abstract
The EMSY gene encodes a protein that interacts with Brca2 and is amplified in some sporadic cases of human breast cancer. To examine whether overexpression of EMSY would mimic the chromosome instability phenotype that is associated with the loss of Brca2 function, we constructed a lentiviral vector (Lenti-EMSY/GFP) that encodes a truncated form of the Emsy protein, including its Brca2-interacting domain, and green fluorescent protein (GFP) and used it to transduce human telomerase-immortalized human breast epithelial (184-hTert) cells, which have a nearly normal karyotype. At passage 5 after transduction, 39 (26%) of 150 EMSY/GFP-transduced metaphase cells contained at least one structural chromosomal abnormality compared with 19 (13%) of 150 GFP-transduced metaphase cells (P = .003, chi-square test); at passage 10, the corresponding frequencies were 42% and 15%, respectively (P < .001). Mitomycin C also produced a severalfold higher frequency of chromosome breaks in the EMSY/GFP-transduced cells than in the control cells. These results support the hypothesis that EMSY overexpression can play a role in the genesis of human breast cancer.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".